Taxon
- Abies13 objects
- Abies magnifica1 objects
- Abrus precatorius6 objects
- Accipiter nisus1 objects
- Accipitridae121 objects
- Acer macrophyllum25 objects
- Acer negundo var. californicum1 objects
- Achillea millefolium1 objects
- Achyrachaena mollis1 objects
- Achyranthes bidentata3 objects
- Acipenser2 objects
- Acipenser transmontanus184 objects
- Acipenseridae2 objects
- Acropora19 objects
- Actinopterygii78 objects
- Adiantum3 objects
- Adiantum pedatum111 objects
- Aechmophorus2 objects
- Aechmophorus occidentalis12 objects
- Aesculus californica1 objects